申論題

2. A closed and rigid vessel containing air-water vapor mixture undergoes a cooling process with the volume of 2.172 m³, Fig.2. The operation conditions are summarized in Table 2. The dew point temperature of the initial state is 99.63℃. Air behaviors as an ideal gas with specific heat ratio of 1.4. Determine (a) the initial temperature of mixture Ti, in℃, (b) the initial pressure of mixture p₁, in bar, (c) the mass of vapor, in kg, (d) the mass of dry air, in kg, (e) the temperature of mixture T₂ when water vapor starts to condensate, in ℃, (D) the pressure of the mixture P₂, in bar, as the mixture temperature reaches T₂, (g) the heat transfer during the cooling process, in kJ, (h) the entropy production during the cooling process, in kJ/K, if the vessel boundary always keeps at a constant temperature of T₂. (32%)